Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
Explanation:
Explanation: the movement of organelles and other substances within cells. Endoplasmic reticulum
Answer:
So when the first animals moved onto land, they had to trade their fins for limbs, and their gills for lungs, the better to adapt to their new terrestrial environment
Explanation:
Answer:
Explanation:
Student A because it requires a hypothesis
Answer:
Increased blood flow kills healthy cells which prevents infection at the site of the injury.
Increased blood flow carries white blood cells to the site of the injury.
Explanation:
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